Massachusetts Institute of Technology Department of Electrical
... machines have not reached application and are not likely to. In the machines we have examined so far the machine is operated from an alternating voltage source. Indeed, this is one of the principal reasons for employing AC in power systems. The first electric machines employed a mechanical switch, i ...
... machines have not reached application and are not likely to. In the machines we have examined so far the machine is operated from an alternating voltage source. Indeed, this is one of the principal reasons for employing AC in power systems. The first electric machines employed a mechanical switch, i ...
the Canon DSLR Power Supply Datasheet
... This power supply uses a simple and almost foolproof linear design. There is a wide variety of linear regulator chips on the market which simply take some DC input voltage and regulate it to some lower DC output voltage. In my particular case, I used an LT1083 adjustable regulator since that is what ...
... This power supply uses a simple and almost foolproof linear design. There is a wide variety of linear regulator chips on the market which simply take some DC input voltage and regulate it to some lower DC output voltage. In my particular case, I used an LT1083 adjustable regulator since that is what ...
UNIT-IV 1 Mark questions
... resistance to be added to the field circuit to increase speed to 1000 r.p.m at an armature current of 80A. Assume flux proportional to field current. Armature resistance=0.15 ohms and field winding resistance=250 ohms. A DC shunt motor supplied at 230V runs at 990 rpm. Calculate the resistance requi ...
... resistance to be added to the field circuit to increase speed to 1000 r.p.m at an armature current of 80A. Assume flux proportional to field current. Armature resistance=0.15 ohms and field winding resistance=250 ohms. A DC shunt motor supplied at 230V runs at 990 rpm. Calculate the resistance requi ...
Thomas Jan98.qxd
... one drawing current from the supply. The idea here, then, is to build a power supply once making sure that it has enough beef to handle a number of modules. What voltages are needed for electronic music devices? Well, for analog circuitry, history has shown that a bipolar 15V supply is best for a va ...
... one drawing current from the supply. The idea here, then, is to build a power supply once making sure that it has enough beef to handle a number of modules. What voltages are needed for electronic music devices? Well, for analog circuitry, history has shown that a bipolar 15V supply is best for a va ...
appendixD
... A function generator should be considered a variable frequency, variable voltage AC (bipolar) power supply. With the DC offset turned off the average value of the output is = 0V, but the DC offset control can be used to adjust the average value (so that the output voltage never goes below 0 VDC, for ...
... A function generator should be considered a variable frequency, variable voltage AC (bipolar) power supply. With the DC offset turned off the average value of the output is = 0V, but the DC offset control can be used to adjust the average value (so that the output voltage never goes below 0 VDC, for ...
AN1529
... The ST7265 features a VDDF pin to make it easier to interface between the its own MCU supply (VDD) and external devices with a lower voltage supply. This VDDF pin can be used as a selectable 2.4 to 3.6V power supply to external devices and to supply some of the ST7265 I/Os: consequently, a device su ...
... The ST7265 features a VDDF pin to make it easier to interface between the its own MCU supply (VDD) and external devices with a lower voltage supply. This VDDF pin can be used as a selectable 2.4 to 3.6V power supply to external devices and to supply some of the ST7265 I/Os: consequently, a device su ...
Real Time Voltage and Current Phase Shift Analyzer for Power
... reactive power in power lines which can be optimized (reduced). Reactive power is the main component which overloads power lines and brings excessive thermal stress to conductors. If the reactive power is optimized, it can significantly lower the electricity consumption (from 10 to 30%—varies betwee ...
... reactive power in power lines which can be optimized (reduced). Reactive power is the main component which overloads power lines and brings excessive thermal stress to conductors. If the reactive power is optimized, it can significantly lower the electricity consumption (from 10 to 30%—varies betwee ...
INTRODUCTION TO BASIC POWER SUPPLIES
... Transformers are rated in VA – Volt Amps - with respect to their outputs A 20VA transformer with a 10V secondary will provide 2A (10V x 2A = 20VA) A 45VA transformer with a 15V secondary will provide 3A (15V x 3A = 45VA) A 60VA transformer with two 20V secondary windings will provide 1.5A from each ...
... Transformers are rated in VA – Volt Amps - with respect to their outputs A 20VA transformer with a 10V secondary will provide 2A (10V x 2A = 20VA) A 45VA transformer with a 15V secondary will provide 3A (15V x 3A = 45VA) A 60VA transformer with two 20V secondary windings will provide 1.5A from each ...
Low power factor
... power factor comes in. Power factor control is an effective way of conserving power, and it also determines the cable size of the conductors in both the final sub-circuit and the main supply line. We will consider power factor, looking at the relevant terms and the methods used to accomplish power f ...
... power factor comes in. Power factor control is an effective way of conserving power, and it also determines the cable size of the conductors in both the final sub-circuit and the main supply line. We will consider power factor, looking at the relevant terms and the methods used to accomplish power f ...
Unit_4_QA
... accommodating 6 conductors per slot. The number of stator slots =63. If the slip ring voltage on open circuit is to be about 400 volts, find the number of rotor slots and the number of conductors in each rotor slot. ...
... accommodating 6 conductors per slot. The number of stator slots =63. If the slip ring voltage on open circuit is to be about 400 volts, find the number of rotor slots and the number of conductors in each rotor slot. ...
chapter vii - Florida Building Code
... Depending of the type of service provided the lamps may be classified as: - General lighting service lamps are those of 120 V rating for ordinary uses in homes, offices, etc. - Special lighting service lamps, which are used in similar locations, but they have special shape, color of bulb, or any oth ...
... Depending of the type of service provided the lamps may be classified as: - General lighting service lamps are those of 120 V rating for ordinary uses in homes, offices, etc. - Special lighting service lamps, which are used in similar locations, but they have special shape, color of bulb, or any oth ...
ROMANSO ELECTRONICS CO., LTD NAME: DMX Controller
... supply voltage: DC5V, 12V ,18V, 24V optional(specify the required voltage on orders) output: 3 channels connection mode: common anode ...
... supply voltage: DC5V, 12V ,18V, 24V optional(specify the required voltage on orders) output: 3 channels connection mode: common anode ...
Power Applications
... Here below a short description of the most important PSTs manufactured by Tamini over the years. a) One core design with both in-phase and shifting regulation, 75 MVA: • Primary side: 154.5 kV +18/-10 x 1.97 kV with on load tap changer for in-phase regulation; • Secondary side: 138 kV ± j16 x 3. ...
... Here below a short description of the most important PSTs manufactured by Tamini over the years. a) One core design with both in-phase and shifting regulation, 75 MVA: • Primary side: 154.5 kV +18/-10 x 1.97 kV with on load tap changer for in-phase regulation; • Secondary side: 138 kV ± j16 x 3. ...
2014_DC_Electrical_Safety_Standards
... – More voltage is needed to “reignite” the arc after each current zero than a DC arc. – This effect is somewhat cancelled, however, in inductive circuits, as a voltage appears across the gap during a current zero. ...
... – More voltage is needed to “reignite” the arc after each current zero than a DC arc. – This effect is somewhat cancelled, however, in inductive circuits, as a voltage appears across the gap during a current zero. ...
Power Point
... – More voltage is needed to “reignite” the arc after each current zero than a DC arc. – This effect is somewhat cancelled, however, in inductive circuits, as a voltage appears across the gap during a current zero. ...
... – More voltage is needed to “reignite” the arc after each current zero than a DC arc. – This effect is somewhat cancelled, however, in inductive circuits, as a voltage appears across the gap during a current zero. ...
Light Intensity, Blackbody Radiation
... alternative sources of power are either solar energy (a form of nuclear fusion energy), used directly or via secondary effects such as wind or waves, or nuclear fission using nuclear reactors. Direct conversion of solar to electrical energy and power using silicon photovoltaic devices similar to the ...
... alternative sources of power are either solar energy (a form of nuclear fusion energy), used directly or via secondary effects such as wind or waves, or nuclear fission using nuclear reactors. Direct conversion of solar to electrical energy and power using silicon photovoltaic devices similar to the ...
DC POWER SUPPLY BLOCK DIAGRAM OF POWER SUPPLY
... loops. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages. Electronic voltage regulators are found in devices such as computer power supplies where they stabilize the DC voltages used by the processor ...
... loops. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages. Electronic voltage regulators are found in devices such as computer power supplies where they stabilize the DC voltages used by the processor ...
Electrification
Electrification is the process of powering by electricity and is usually associated with changing over from another power source. The broad meaning of the term, such as in the history of technology and economic history, usually applies to a region or national economy. Broadly speaking, electrification was the build out of the electrical generating and distribution systems which occurred in Britain, the United States, and other countries from the mid-1880s until around 1950 and is in progress in rural areas in some developing countries. This included the change over from line shaft and belt drive using steam engines and water power to electric motors.The electrification of particular sectors of the economy is called by terms such as factory electrification, household electrification, rural electrification or railway electrification. It may also apply to changing industrial processes such as smelting, melting, separating or refining from coal or coke heating or chemical processes to some type of electric process such as electric arc furnace, electric induction or resistance heating or electrolysis or electrolytic separating.Electrification was called ""the greatest engineering achievement of the 20th Century"" by the National Academy of Engineering.